Rapid growth of Indian economy has stirred a tremendous need for power and has resulted in operation of
power infrastructure to their limits. One important impediment in operating the power infrastructure at their maximum
operating point is low-frequency electromechanical oscillations typically in the range of 0.1–0.8 Hz. This paper
elaborates a scheme for damping these oscillations using combination of PI and UPFC device. The results of the
proposed approach are validated for a 3-machine 9-Bus WSCC test power system.